Opening arguments are set to begin Monday in the trial for two men accused in the 2009 shooting death of Chicago police officer Alejandro Valadez.
Cook County State's Attorney Anita Alvarez will serve as lead prosecutor.
Valadez was shot to death as he investigated a shots fired call on the city's South Side in June 2009.
Eric Walker and Christopher Harris are being held without bond in Cook County Jail.
Another person has already been found guilty in connection with Valadez' death. Shawn Gaston is serving a 125-year prison sentence.
Prosecutors contended Gaston was out for revenge after he and other alleged gang members were shot at by rivals